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Technical Data Sheet
PartsTable / O-RING / 172MRK2
172MRK2 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The O-RING is a the manufacturer industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-245-9005, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
172MRK2
NSN: 5331-00-245-9005
FSC: 5331 — O-RING
CAGE: 05415 — LINDE LIFT TRUCK CORP. (USA)
SPECIFICATIONS
Part Number172MRK2
NSN5331-00-245-9005
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 172MRK2 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
1955-1Interchangeable
interchangeable cross-reference
interchangeable
195595-1Interchangeable
interchangeable cross-reference
interchangeable
1955-2Interchangeable
interchangeable cross-reference
interchangeable
MIL-H-12732Interchangeable
interchangeable cross-reference
interchangeable
7819603-010Interchangeable
interchangeable cross-reference
interchangeable
X7422 PIECE 97Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 172MRK2?
172MRK2 is a O-RING.
What parts can replace 172MRK2?
There are 14 known substitutes for 172MRK2: 1955-1, 195595-1, 1955-2 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 172MRK2?
172MRK2 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5331-00-245-9005. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026